Features of Huawei adsl2+ and 4bandVDSL access mode

Huawei's new adsl2+, 4bandVDSL access mode has the following characteristics:

1. Unified Broadband Access platform. In the original Dslam equipment directly to achieve the introduction of adsl2+, 4bandVDSL access mode, that is, in the original Smartaxdslam equipment and other business Board slot compatible interface Board, the original equipment can be based on user needs to achieve flexible configuration options.

2. Unified management Platform. Simplify the operation of new technology in equipment application. 3. Unified testing Platform. Realize the unified operation with the original DSLAM equipment test, need not be configured separately. Huawei's latest adsl2+ access technology conforms to itu-tg.992.3 (ADSL2) and g.992.5 (adsl2+) standards. Adsl2/2+ has added some new features on the basis of the first generation ADSL, which has been improved greatly in performance and function. Adsl2+ is developed on the basis of ADSL2, adsl2+ possesses all the characteristics of ADSL2.

Higher rate: adsl2+ due to the use of a wider spectrum, more sub-carrier number (512), when the distance is shorter, the downlink rate of up to 24mb/s.

Longer access distance: support distance of nearly 7km applications, the rate can be up to the downlink no less than 192kb/s and uplink no less than 128kb/s.

A richer chip-level circuit testing function: SELT (singleendlooptest) can be the length of the line, can reach the speed, the line diameter of the single-ended test, follow-up will also support Delt (dualendlooptest), on line noise, loop attenuation and length, Bridge-Tap (Bridgetap), up to the speed of a more accurate two-terminal test.

Lower power consumption: by reducing the transmission power, the new low power mode and Co, CPE have powercutback functions such as power management functions, to provide equipment stable operation of lower power consumption.

Better interoperability: The ADSL transceiver is divided into TPS-TC (transport protocol-related aggregation sublayer), PMS-TC (physical media-related aggregation sublayer), PMD (physical media-related sublayer), and MPS-TC (Management protocol-related aggregation sublayer for network interface), Each child layer is encapsulated and the message between each child layer is defined, which facilitates interoperability between different manufacturers ' devices.

More operating modes: Full digital mode Annexi with Adsloverpots (ANNEXA) compatible spectrum and full digital mode Annexb with ADSLOVERISDN (ANNEXJ) compatible spectrum, which can be used to transmit uplink data Services using narrowband voice service frequency bands.

More stable operation with better spectrum compatibility and line diagnostics. Huawei has also introduced 4bandVDSL access technology, according to the standard VDSL in the itug.993.1 4BAND Band division, the use of twisted-pair in the range of 1.5 kilometers below the maximum access bandwidth to the symmetrical 25Mbps, asymmetric 52/26mbps rate. In the application of LONGREACHVDSL (LRVDSL), 3 km can reach the 4mbps/0.6mbps transmission rate, which greatly expands the application space of VDSL.